#include <bits/stdc++.h>
using namespace std;

int32_t main() {
    ios::sync_with_stdio(false);
    cin.tie(0); 
    cout.tie(0);

    #ifdef SUBLIME
        freopen("inputf.in", "r", stdin);
        freopen("outputf.out", "w", stdout);
        freopen("error.txt", "w", stderr);
    #endif

    int n;
    cin >> n;
    cout << 0 << "\n";
    return 0;
}